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About Counting MCQs

This Aptitude topic mainly uses the logic of sets and Venn diagrams. A typical question gives the number of students studying two subjects and asks how many study both, using the rule that the total equals group A plus group B minus those in both. Other items combine percentages, such as finding a class size when known shares pass, fail or pass both subjects, and some test inclusive counting, such as how many pages are read from page 110 to page 114. Careful reading is vital, because the words 'both', 'either' and 'neither' change the answer completely.

Exams that include Counting MCQs

Pakistan

  • NTS
  • GAT
  • ISSB
  • Army/Navy/PAF initial tests
  • FPSC
  • PPSC
  • Banking job tests

India

  • SSC CGL
  • SSC CHSL
  • IBPS PO
  • SBI PO
  • RRB NTPC
  • Campus placements

Bangladesh

  • BCS
  • Bank job exams
  • Government job tests

Frequently asked questions

How do you solve overlapping set problems?

Use the formula n(A or B) = n(A) + n(B) minus n(A and B). If 150 students are in a school, 100 study Physics and 70 study English, and everyone studies at least one, then 100 + 70 minus 150 = 20 students study both.

Why do counting questions often give wrong answers?

Most mistakes come from inclusive counting and wording. Reading pages 110 to 114 means five pages, not four, because both end pages are counted. Words such as 'neither' or 'only' also change the calculation, so underline them before you start working.

How many Counting MCQs are on MCQs360?

MCQs360 has 32 Counting MCQs, each with an instant answer. They are free with no sign-up. Drawing a quick Venn diagram for each question while you practise is the fastest way to build the habit you will need in the exam hall.

Last reviewed October 2026